package com.atguigu.realtime.util;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.realtime.annotation.NotSink;
import com.atguigu.realtime.bean.TableProcess;
import com.atguigu.realtime.common.Constant;
import com.atguigu.realtime.sink.PhoenixSink;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.connector.jdbc.JdbcConnectionOptions;
import org.apache.flink.connector.jdbc.JdbcExecutionOptions;
import org.apache.flink.connector.jdbc.JdbcSink;
import org.apache.flink.connector.jdbc.JdbcStatementBuilder;
import org.apache.flink.shaded.guava18.com.google.common.base.CaseFormat;
import org.apache.flink.streaming.api.functions.sink.SinkFunction;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer;
import org.apache.flink.streaming.connectors.kafka.KafkaSerializationSchema;
import org.apache.kafka.clients.producer.ProducerRecord;

import javax.annotation.Nullable;
import java.lang.reflect.Field;
import java.nio.charset.StandardCharsets;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Properties;
import java.util.stream.Collectors;

/**
 * @Author lzc
 * @Date 2022/7/18 9:17
 */
public class FlinkSinkUtil {
    public static SinkFunction<Tuple2<JSONObject, TableProcess>> getPhoenixSink() {
        return new PhoenixSink();
        
    }
    
    public static SinkFunction<String> getKafkaSink(String topic) {
        Properties props = new Properties();
        props.setProperty("bootstrap.servers", Constant.KAFKA_BROKERS);
        props.put("transaction.timeout.ms", 15 * 60 * 1000);
        
        
        return new FlinkKafkaProducer<String>(
            "default",
            new KafkaSerializationSchema<String>() {
                @Override
                public ProducerRecord<byte[], byte[]> serialize(String element,
                                                                @Nullable Long timestamp) {
                    return new ProducerRecord<>(topic, element.getBytes(StandardCharsets.UTF_8));
                }
            },
            props,
            FlinkKafkaProducer.Semantic.EXACTLY_ONCE
        );
    }
    
    public static <T> SinkFunction<T> getClickHouseSink(String table,
                                                        Class<T> tClass) {
        // 工具的前提: pojo的中的属性名要和表中的字段名保持一致
        String driver = Constant.CLICKHOSUE_DRIVER;
        String url = Constant.CLICKHOSUE_URL;
        // 从class中找到所有的属性名
        Field[] fields = tClass.getDeclaredFields();
        String names = Arrays.stream(fields)
            .filter(field -> {
                // 把不需要写入到clickhouse的字段提前过滤掉
                //return  !field.getName().equals("orderIdSet") && !field.getName().equals("sku_id");
                NotSink noSink = field.getAnnotation(NotSink.class);
                return noSink == null;
                
            })
            .map(field -> {
                // 把java的驼峰缓存下划线
                return CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, field.getName());
            }).collect(Collectors.joining(","));
        // insert into t (a, b,c)values(?,?,?)
        StringBuilder sql = new StringBuilder();
        sql
            .append("insert into ")
            .append(table)
            .append("(")
            .append(names)
            .append(")values(")
            .append(names.replaceAll("[^,]+", "?")) // 把字段用?替换
            .append(")");
        
        System.out.println("clickhouse插入语句: " + sql);
        
        return getJdbcSink(driver, url, null, null, sql.toString());
    }
    
    private static <T> SinkFunction<T> getJdbcSink(String driver,
                                                   String url,
                                                   String user,
                                                   String password,
                                                   String sql) {
        return JdbcSink
            .sink(sql,
                  new JdbcStatementBuilder<T>() {
                      @Override
                      public void accept(PreparedStatement ps,
                                         T t) throws SQLException {
                          // 从对象t中取出值, 给 ps(sql)中的占位符进行赋值
                          // TODO  insert into dws_traffic_source_keyword_page_view_window(stt,edt,source,keyword,keyword_count,ts)values(?,?,?,?,?,?)
                          // 根据字段名, 从 t对象中取出对应的值, 给占位符赋值
                          // 获取class: Class.forName  类名.class  对象.getClass
                          Class<?> tClass = t.getClass();
                          Field[] fields = tClass.getDeclaredFields();
                    
                          int position = 1;
                          try {
                              for (Field field : fields) {
                                  NotSink noSink = field.getAnnotation(NotSink.class);
                                  if (noSink == null) {
                                      field.setAccessible(true);
                                      Object v = field.get(t);
                                      ps.setObject(position++, v);
                                  }
                              }
                          } catch (IllegalAccessException e) {
                              e.printStackTrace();
                          }
                      }
                  },
                  new JdbcExecutionOptions.Builder()
                      .withBatchSize(10)
                      .withBatchIntervalMs(2000)
                      .withMaxRetries(3)
                      .build(),
                  new JdbcConnectionOptions.JdbcConnectionOptionsBuilder()
                      .withDriverName(driver)
                      .withUrl(url)
                      .withUsername(user)
                      .withPassword(password)
                      .build()
            
            );
    }
    
    
}
